Typical Characteristics
R&S
®
RT
‑
Z1M
15
Manual 1801.3142.02 ─ 02
4
Typical Characteristics
The R&S
RT
‑
Z1M 1
MOhm adapter has several gain or attenuation modes. The mode
of the adapter, and thus the gain or attenuation, depends on the vertical scale and is
set automatically by the oscilloscope to achieve optimized system behavior.
4.1
Bandwidth
The R&S
RT
‑
Z1M has a bandwidth of 500
MHz. You can reduce the bandwidth to 200
MHz or 20 MHz, see
Chapter 3.5.3, "Analog Bandwidth"
,
on page 13. The transfer
functions of the gain or attenuation modes are shown in
Figure 4-1
.
The bandwidth of a system specifies the maximum frequency at which a purely sinus-
oidal signal is still transferred at 70
% (–3
dB) of its amplitude.
The bandwidth of the whole measurement setup also depends on the bandwidth of the
probe connected to the R&S
RT
‑
Z1M, and the bandwidth of the oscilloscope.
Figure 4-1: Amplitude/frequency response of the R&S
RT
‑
Z1M, all 7 modes
4.2
Step Response
The step response up to 20
ns of the R&S
RT
‑
Z1M 1
MOhm adapter is shown in
Fig-
ure 4-2
. The propagation delay is normalized to the beginning of the step. The ampli-
tude is normalized to the steady state value.
Step Response
